Home / 85,819.18-128,561.18-40,776.43

Finding the Fourth Proportional to 85,819.18, 128,561.18 and 40,776.43

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Solution

The fourth proportional to 85,819.18, 128,561.18 and 40,776.43 is: 61,085.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,819.18 : 128,561.18 = 40,776.43 : x
  2. Step 2: Convert to fraction form
    85,819.18/128,561.18 = 40,776.43/x
  3. Step 3: Cross multiply
    85,819.18x = 128,561.18 × 40,776.43
  4. Step 4: Simplify right side
    85,819.18x = 5,242,265,956.99
  5. Step 5: Solve for x
    x = 5,242,265,956.99/85,819.18
  6. Step 6: Final answer
    x = 61,085.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.